Connected: An Internet Encyclopedia
RFC 1123 - 6.1.2.2 QCLASS Values: RFC-1035 Section 3.2.5

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### 6.1.2.2 QCLASS Values: RFC-1035 Section 3.2.5

A query with "QCLASS=*" SHOULD NOT be used unless the requestor is seeking data from more than one class. In particular, if the requestor is only interested in Internet data types, QCLASS=IN MUST be used.

Next: 6.1.2.3 Unused Fields: RFC-1035 Section 4.1.1

Connected: An Internet Encyclopedia
RFC 1123 - 6.1.2.2 QCLASS Values: RFC-1035 Section 3.2.5